code: def and_variations(string, language):
      and_regex = AND_REGEXES.get(language, None)
      if and_regex is None:
          return set()
  
      matches = [m for m in and_regex.finditer(string)]
      if not matches:
          return set()
  
      matches = sorted(matches, key=lambda x: x.start())
      and_utterances = AND_UTTERANCES[language]
      values = [
          ({START: m.start(), END: m.end()}, and_utterances)
          for m in matches
      ]
  
      n_values = len(values)
      n_and_utterances = len(and_utterances)
      if n_and_utterances**n_values > MAX_ENTITY_VARIATIONS:
          return set()
  
      combinations = itertools.product(
          range(n_and_utterances), repeat=n_values
      )
      variations = set()
      for c in combinations:
          ranges_and_utterances = [
              (values[i][0], values[i][1][ix]) for i, ix in enumerate(c)
          ]
          variations.add(
              build_variated_query(string, ranges_and_utterances)
          )
      return variations
  
file_path: snips-nlu/snips_nlu/string_variations.py
imports: from __future__ import unicode_literals
  import itertools
  import re
  from builtins import range, str, zip
  from future.utils import iteritems
  from snips_nlu.constants import END, LANGUAGE_DE, LANGUAGE_EN, LANGUAGE_ES, LANGUAGE_FR, RESOLVED_VALUE, RES_MATCH_RANGE, SNIPS_NUMBER, START, VALUE
  from snips_nlu.languages import get_default_sep, get_punctuation_regex, supports_num2words
  from snips_nlu.preprocessing import tokenize_light
label_desc: Use image node_id 2 for calling a global function with example usage: and_variations(string, language) and returns: variations, set, set, set